Source identification and risk analysis of potentially toxic elements (PTEs) in rainwater runoff from a manganese mine (south central Hunan, China)
Source identification and risk analysis of potentially toxic elements (PTEs) in rainwater runoff from a manganese mine (south central Hunan, China)
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DOI：
10.2166/ws.2020.352
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发表时间：
2020-12
期刊：
影响因子：
1.7
通讯作者：
Xin Luo;Bozhi Ren;A. Hursthouse;Feng Jiang;Renjian Deng;Zhenghua Wang
中科院分区：
文献类型：
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作者：
Xin Luo;Bozhi Ren;A. Hursthouse;Feng Jiang;Renjian Deng;Zhenghua Wang
锰矿区的潜在有毒元素(PTE)普遍存在于雨水径流中，对人类健康构成重大威胁。本研究采用野外调查、正矩阵分解和地理信息系统相结合的地统计分析方法，对湘潭某锰矿区雨水径流污染进行了系统研究，评价了降雨径流对大气污染物健康风险评价的源贡献。6种PTE的平均浓度(mg/L)分别为：0.3357(锰)、0.0450(镍)、0.0106(铜)、0.0148(锌)、0.0068(镉)和0.0390(铅)。锰和锌的变异系数(CV)分别为>；180%和>；130%，其他分析物的变异系数小于70%。地理信息系统和PMF分析产生了更精细的空间来源分配，包括采矿、冶炼、运输、农业生产和自然来源。健康风险评估结果表明，非致癌风险可以忽略不计，致癌风险具有潜在危险，但对成年人和儿童都是可以接受的。此外，儿童的总致癌风险值大于成人，突显了他们的脆弱性。这项研究表明，PMF有潜力提供一个框架，在空间上优先确定矿区内的治理目标，以改善环境条件。
Potentially toxic elements (PTEs) in manganese ore areas are prevalent in rainwater runoff and pose a major threat to human health. In this study, field investigation and geostatistical analysis methods of positive matrix factorization (PMF) and geographic information systems (GIS) were used to systematically study the pollution in rainwater runoff from a manganese mining area in Xiangtan, China, to evaluate source contributions for the health risk assessment of PTEs. The average concentrations (mg/L) of six PTEs were: 0.3357 (Mn), 0.0450 (Ni), 0.0106 (Cu), 0.0148 (Zn), 0.0068 (Cd) and 0.0390 (Pb). The coefficients of variation (CV) for Mn and Zn were >180% and >130%, with the other analytes having values below 70%. The GIS and PMF analysis produced more refined spatial source apportionments, including mining, smelting, transportation, agricultural production and natural sources. The results of the health risk assessment showed that the non-carcinogenic risk was negligible, and the carcinogenic risk was potentially dangerous but acceptable for both adults and children. In addition, the children’s total carcinogenic risk value was greater than that of adults, highlighting their vulnerability. This study demonstrates the potential of PMF to provide a framework to spatially prioritize treatment objectives within the mining region to improve environmental conditions.